03813: shadoww, shadowwa, gaiden, ryukendn, ryukendna: Lost blending effect

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
03813	Graphics	Minor	Always	Apr 14, 2010, 11:08	Apr 15, 2010, 20:57

Tester	abelardator2	View Status	Public	Platform
Assigned To	Haze	Resolution	Fixed	OS
Status [?]	Resolved			Driver	tecmo/gaiden.cpp
Version	0.137u2	Fixed in Version	0.137u3	Build
		Fixed in Git Commit		Github Pull Request #

Summary	03813: shadoww, shadowwa, gaiden, ryukendn, ryukendna: Lost blending effect
Description	When an enemy dies this is on the floor with a transparency effect in the real pcb. In MAME flashes.
Steps To Reproduce
Additional Information
Github Commit

Flags	Verified with Original
Regression Version
Affected Sets / Systems	shadoww, shadowwa, gaiden, ryukendn, ryukendna

Attached Files	A2.jpg (171,137 bytes) Apr 14, 2010, 11:08
	A3.jpg (171,393 bytes) Apr 14, 2010, 11:09
	A4.jpg (182,959 bytes) Apr 14, 2010, 11:09
	A5.jpg (179,334 bytes) Apr 14, 2010, 16:04
	A6.jpg (187,786 bytes) Apr 14, 2010, 16:05
	A7.jpg (183,525 bytes) Apr 14, 2010, 16:05
	HPIM1087.MPG (3,734,990 bytes) Apr 14, 2010, 16:06
	HPIM1092.MPG (4,294,608 bytes) Apr 14, 2010, 16:07

No.05972 Haze Senior Tester Apr 14, 2010, 11:58	given the context (other games in the driver support transparency effects) this makes sense, although tests for such effects on real monitors can be deceptive, as flickering effects can appear as transparency effects due to properties of the monitor, rather than the game (for example, there are still people who claim MAME's NeoGeo emulation is wrong because the shadows flicker instead of being transpraent, when actually it's correct) anyway, in this case if ((attributes & 0x20) && (video_screen_get_frame_number(machine->primary_screen) & 1)) goto skip_sprite; should probably enable it instead of flickering (as it does for Raiga)
No.05973 abelardator2 Tester Apr 14, 2010, 12:05	I think there is a transparent effect, I have watched carefully. For example is very different from the flicker that occurs when the player is beaten and recover, to when the player or enemy die.
No.05974 Haze Senior Tester Apr 14, 2010, 12:41 edited on: Apr 14, 2010, 12:43	yeah.. in this case it should almost certainly be a transparency (well, a pen manipulation effect), we know Tecmo had transparency effects on their hardware of this period (Super Pinball Action, Raiga, and now this) It makes sense. How do the 'transparent' sprites interact with other sprites? what happens if 2 transparent ones overlap (nothing I'm assuming, but it would be good to know) If there any other use of transparency missing in this game? (Raiga can do the effect on tilemaps too)
No.05975 abelardator2 Tester Apr 14, 2010, 13:02 edited on: Apr 14, 2010, 13:04	Attempts to make a new photos with 2 enemies dead together. I have not seen any similar effect more, I think for the rest is correct. Use a good quality CRT TV, and the image is very accurate.
No.05976 abelardator2 Tester Apr 14, 2010, 16:08	I upload new photos and two videos.
No.05977 Haze Senior Tester Apr 14, 2010, 16:16	ok, thanks. I'll see what I can do with it.
No.05978 Haze Senior Tester Apr 15, 2010, 19:45	fwiw I've implemented this by merging it to use the same code as Raiga. The effect seems darker than these screenshots tho, which surprises me, because it's a palette number manipulation effect, rather than a blending effect, which means the colour level isn't up to me. I'm also not 100% sure about the priority.
No.05979 abelardator2 Tester Apr 15, 2010, 20:57	Ok, this is great. If you need some photos or video with better quality, let me know. Thanks for solving this.